162821domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) = smallest prime p for which (r-p)/log(p) < 1/n, where r is the next prime after p.at n=5A082884Primes from merging of 6 successive digits in decimal expansion of exp(Pi).at n=19A105011Number of (n+1) X 3 0..1 matrices with each 2 X 2 subblock idempotent.at n=19A224544Prime numbersat n=14916